def info():
    a = input("请输入第一行：")
    b = input("请输入第二行：")
    list_num = b.split(" ")
    if int(a) != len(list_num):
        return "第一行是几个第二行就输出几个，请重新运行"
    else:

        set_num = set(list_num)
        return set_num
        pass


if __name__ == '__main__':
    print(info())
    pass
